Karn, the Great Creator (Japanese Alternate Art) [War of the Spark] Books Emerge {5}{U}{U} (You may cast

Emerge {5}{U}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value

Set: Magic Player Rewards 2003 Type: Creature — Human Wizard Rarity: Rare Cost: {U}{U} {U}{U}

sacrifice that many nontoken permanents

Set: IDW Comics 2014 Type: Sorcery Rarity: Rare Cost: {3}{U}{U} Search target opponent's library for an artifact card and put that card onto the battlefield under your control

If they exist

Karn, the Great Creator (Japanese Alternate Art) [War of the Spark] Books Emerge {5}{U}{U} (You may castSet: War of the Spark Type: Legendary Planeswalker Karn Rarity: Rare Cost: {4} Activated abilities of artifacts your opponents control can't be activated. +1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value. 2: You may reveal an artifact card you own from outside the game or choose a face up artifact card you own in exile. Put that card into your hand.